History Middle Ages īaszta Czarownic from 1415, one of the few remaining witch towers in Europe. Stolpe is also the Latin exonym for this place. The city was occasionally called Stolpe, referring to the Słupia River, whose German name is Stolpe. The Germanised name comes from one of five Slavic Pomeranian names of this settlement. Later, during German rule, the town was named Stolp, to which the suffix in Pommern was attached in order to avoid confusion with other places similarly named. There are two hypotheses about the origin of those names: that it refers to a specific way of constructing buildings on boggy ground with additional pile support, which is still in use, or that it is connected with a tower or other defensive structure on the banks of the Słupia River. Slavic names in Pomeranian - Stolpsk, Stôłpsk, Słëpsk, Słëpskò, Stôłp - and Polish - Słupsk - may be etymologically related to the words słup ("pole") and stołp ("keep"). After World War II, the city again became part of Poland, as it fell within the new borders determined by the Potsdam Conference. In 1815 it was incorporated into the newly formed Prussian Province of Pomerania. In 1648, according to the peace treaty of Osnabrück, Stolp became part of Brandenburg-Prussia.
Between 13 it was a residence of the Dukes of Pomerania, until 1474 vassals of the Kingdom of Poland. By the 14th century, the town had become a centre of local administration and trade and a Hanseatic League associate. Słupsk had its origins as a Pomeranian settlement in the early Middle Ages. The neighbouring administrative districts ( gminas) are Kobylnica and Gmina Słupsk. Located near the Baltic Sea and on the Słupia River, the city is the administrative seat of Słupsk County and was until 1999 the capital of Słupsk Voivodeship. It occupies 43.15 square kilometres (16.66 sq mi) and, according to the Central Statistical Office, Słupsk is one of the most densely populated cities in the country. Słupsk ( ( listen) Kashubian: Stôłpsk Kashubian pronunciation: formerly German: Stolp also known by several alternative names) is a city in the Pomeranian Voivodeship, in northwestern Poland, with a population of 91,007 inhabitants as of December 2018.